JPH04327844A - Surgical electric operating device - Google Patents

Abstract

PURPOSE:To provide a surgical electric operating device wherein water or steam would not go into a portion where electric elements including a motor- driven element for driving a surgery treating means are installed. CONSTITUTION:A surgical electric operating device is comprised of a cable portion 29 having an electricity-transmitting built-in lead wire 2 connected to a power source portion and a handpiece portion 24 connected to the cable portion 29 in an airtight state to the outside. In the surgical electric operating device 1 wherein electrical elements including a motor-driven element for driving a surgical treating means are connected to the lead wire 2 and installed inside the hand piece portion 24, the lead wire 2 is divided into two parts in front of a portion 36 of the inside of the hand piece portion 24 where the electric elements including the motor-driven element are installed. Each of the divided parts of the lead wire 2 is electrically and mechanically connected to a receptacle portion 30 having a female pin 42 by a plug portion 18 having a male pin and also a sealing member 26 is provided between the receptacle portion 30 and the plug portion 18.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrically powered surgical device for resecting a lesion within a joint cavity or the like.

0002

2. Description of the Related Art Conventionally, a resection device used in joint surgery, for example, to remove a tumor on the patella or to remove damaged cartilage or bone from a knee joint, has been used in Japanese Patent Application Laid-Open No. 2-13
The one shown in Japanese Patent No. 1757 is known. This device consists of a cable part containing a power supply lead wire that is connected to a power source, a device body connected to this cable part, and an insertion part connected to this device body and inserted into a living body. A cutting blade provided in the insertion portion is rotationally driven by a motor disposed within the main body of the device to cut and remove the resection site.

0003

[Problems to be Solved by the Invention] By the way, there are sterilization methods for sterilizing the resection device using, for example, sterilization gas or chemical solutions, but in order to ensure reliable sterilization, usually
Autoclave sterilization (high-pressure, high-temperature steam sterilization) is performed. Furthermore, conventionally, in order to prevent water vapor from entering the apparatus main body and damaging the motor during autoclave sterilization, for example, the space in which the motor is arranged in the apparatus main body is kept airtight from the outside. It is kept in

However, since the motor is electrically connected to the lead wire inside the cable section and the inside of the cable section is in communication with the space in the main body of the device in which the motor is disposed, the autoclave sterilization process is difficult. There is a risk that water vapor may penetrate the silicone resin jacket of the cable portion, enter the cable portion, and reach the motor space within the device main body through the cable portion. Further, for example, when the jacket resin of the cable part is damaged and a part thereof is damaged, there is a risk that water vapor may enter the cable part from this damaged part and reach the motor space.

The present invention has been made in view of the above-mentioned circumstances, and its object is to prevent water or water vapor from being dissipated in a portion in which an electric element including an electric element for driving a surgical treatment means is built-in. It is an object of the present invention to provide a surgical electric surgical device that does not allow foreign substances to enter.

[0006]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a cable section that incorporates a current-carrying lead wire connected to a power supply section, and a cable section that is airtight from the outside. A surgical electric surgical device comprising a handpiece portion to be connected, and an electric element including an electric element for driving a surgical treatment means is built in the handpiece portion and connected to the lead wire. The lead wire is divided into two parts in front of the part containing the electric element including the electric element in the piece part, and each of the divided lead wires is electrically connected by a receptacle pull part having a female pin and a plug part having a male pin. and a sealing member is provided between the receptacle pull portion and the plug portion while mechanically connecting the receptacle pull portion and the plug portion.

[0007]

[Operation] With the above configuration, the part of the handpiece part that contains electrical elements, including electric elements, is completely isolated from the inside of the cable part, and the airtightness of the part that contains electrical elements is ensured. be done.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 2, the surgical electric surgical device 1 includes a power supply lead wire 2 connected to a power supply device (not shown).
a cable section 29 having a cable 28 built therein; a handpiece section 24 airtightly connected to the cable section 29 to the outside; and a connecting section 54 at the tip of the handpiece section 24 that connects the handpiece section 24 The cutting part 56 is connected to the body, and the target part is cut by inserting the cutting part 56 into the living body and driving it. Furthermore, a motor 52 that drives a cutting section 56 as a surgical treatment means is built into the handpiece section 24 and is electrically connected to the lead wire 2 . Further, the handpiece portion 24 is provided with a suction adjustment knob 50 for adjusting the suction amount of the suction material.

The connection portion between the hand piece portion 24 and the cable portion 29 (the portion indicated by A in the drawing of FIG. 2) is as shown in FIG. 1. The rear end side of the handpiece part 24 located at this connection part has a structure in which a substantially cylindrical receptacle pull receiving part 32 is sealed with an O-ring 44 and fixed with screws (not shown) inside a housing 34. There is.

Two step portions 31 and 33 are formed along the circumferential direction on the outer periphery of the rear end side of the receptacle pull receiving portion 32.
is provided. A portion of the receptacle pull receiving portion 32 from the first stepped portion 31 to the second stepped portion 33 is a medium diameter portion 32b having a smaller outer diameter than the large diameter portion 32a on the distal side thereof, and serves as a receptacle pull receiving portion. Part 32 second
The area extending from the stepped portion 32b to the rear end is the middle diameter portion 32b.
It is a small diameter portion 32c with an even smaller outer diameter.

The motor 52 as an electric element for driving the cutting part 56 and other electric elements can be arranged in a motor arrangement space 36 in the hand piece part 24 extending from the rear end of the large diameter part 32a to the distal end. It has become.

[0012] Also, the large diameter portion 3 of the receptacle pull receiving portion 32
The inside of the rear end of the large-diameter portion 32a is gradually narrowed toward the rear end in order to effectively maintain the airtightness of the motor arrangement space 36 formed at the front end, for example. A first narrow diameter portion 35 is formed inside. Further, the rear end of the first narrow diameter portion 35 is connected to a third step portion 3 formed along the circumferential direction on the inner surface of the receptacle pull receiving portion 32.
7, and this third step portion 37 is located at a portion substantially corresponding to the first step portion 31 formed on the outer periphery of the rear end side of the receptacle pull receiving portion 32. The portion on the tip side from the third stepped portion 37 has an inner diameter larger than that of the first narrow diameter portion 35, and forms the inside of the medium diameter portion 32b. Further, a fourth step portion 39 is provided at a portion of the inner peripheral surface of the receptacle pull receiving portion 32 that substantially corresponds to the second step portion 33 . A portion extending from the fourth stepped portion 39 to the rear end of the receptacle pull receiving portion 32 has an inner diameter larger than the medium diameter portion 32b, and forms the inside of the small diameter portion 32c.

[0013] Further, the tip of a cylindrical receptacle pull 30 is fitted into the first narrow diameter portion 35 with an adhesive or the like, and the rear end of the receptacle pull 30 is fitted into the medium diameter portion 32b. It is located in Seven female pins 42 are buried in the receptacle pull 30, and each female pin 4
Lead wires 2 connected to the motor 52 and other electrical elements are connected to the ends of the leads 2, respectively. Also,
A hole 42a into which a male pin 40 of a plug 18 (described later) is inserted is provided at the rear end of each female pin 42.

On the other hand, the distal end side of the cable section 29 connected to the rear end of the hand piece section 24 consists of a cable 28 and a plug receiving section 10 that holds the distal end of the cable 28. A bend preventing member 8 is fitted on the outer periphery and the outer periphery of the plug receiving portion 10.

The cable 28 is connected to the inside of the jacket tube 4.
The seven lead wires 2 are inserted therethrough, and the rear ends of the seven lead wires 2 are connected to a power supply device (not shown). Further, a substantially cylindrical plug receiving portion 10 is fitted onto the outer periphery of the tip portion of the cable 28 while being sealed by an O-ring 6.

A stepped portion 43 is provided on the inner peripheral surface of the plug receiving portion 10.
is provided, and the stepped portion 4 in the plug receiving portion 10
3, the tip end side is a second narrow diameter portion 45 having a smaller inner diameter than the rear end side. The second narrow diameter portion 45 has an inner diameter slightly larger than the first narrow diameter portion 35 formed in the receptacle pull receiving portion 32, and has a plug 18 fitted therein with an adhesive or the like. have. plug 18
Seven male pins 40 are buried in the hole 42a of the female pin 42 provided in the receptacle pull 30, with the tip of each male pin 40 protruding from the tip of the plug 18.
It can be inserted inside. In addition, each male pin 4
The tips of the lead wires 2 inserted into the cables 28 are connected to the rear ends of the cables 0, respectively.

Furthermore, the handpiece section 24 and the cable section 2
9, the disk-shaped packing 26 as a sealing member interposed between the receptacle pull 30 and the plug 18 is made of, for example, silicone rubber, and its outer diameter is the same as the inner diameter of the second narrow diameter portion 45. It is formed almost the same as that of FIG.
As shown in FIG. 2, the plug 18 has seven through holes 58 into which the seven male pins 40 provided on the plug 18 can be inserted.

Further, the tip of the plug receiving portion 10 is fitted into the inner surface of the medium diameter portion 32b of the receptacle pull receiving portion 32 in substantially close contact with the inner surface of the medium diameter portion 32b of the receptacle pull receiving portion 32 by a stepped portion 47 provided on the outer periphery of the tip of the plug receiving portion 10. A medium-diameter fitting portion 10a that can be fitted, and a small-diameter fitting portion 10 that can be fitted substantially closely to the inner surface of the small-diameter portion 32c.
b is formed. Furthermore, two O-rings 12 are fitted on the outer periphery of the small-diameter fitting portion 10b that fits into the small-diameter portion 32c, and when the handpiece portion 24 and the cable portion 29 are connected, the inner surface of the small-diameter portion 32c and Sealing performance between the small diameter fitting portion 10b and the outer surface can be maintained.

Further, a protrusion 51 protruding in the radial direction is provided on the outer periphery of the plug receiving portion 10 at a portion rearward of the stepped portion 47.
A tapered retaining member 8 having a cap 20 at the tip is slidably and rotatably provided on the outer periphery of the plug receiving portion 10 and the outer periphery of the tip of the cable portion 29 behind the protruding portion 51. It is fitted.

Furthermore, two step portions 53 and 55 are provided on the inner circumferential surface of the cap 20 provided at the tip of the stopper member 8, and these step portions 53 and 55 allow the cap 20 to , a first fitting part 20a that can be fitted to the outer periphery of the medium diameter part 32b of the receptacle pull receiving part 32, and a small diameter part 32c.
A second fitting part 20b that can be fitted to the outer periphery of the plug receiving part 10, and a third fitting part 20c that can be fitted to the outer periphery of the plug receiving part 10 are formed. In other words, when the cap 20 is slid forward together with the snapping member 8 at the outer circumferential portion of the plug receiving portion 10 rearward of the protruding portion 51, the step portion 55 at the tip of the third fitting portion 20c of the cap 20 protrudes. At the time of contact with the portion 51, further forward sliding is restricted, and the first and second fitting portions 20a, 20b protrude forward from the projection portion 51, and the receptacle pull receiving portion 3
It is in a state where it can be fitted onto the outer periphery of the medium diameter portion 32b and small diameter portion 32c of No.2.

Furthermore, a female thread 59 is formed on the inner peripheral surface of the first fitting portion 20a, which can be screwed into the male thread 27 formed on the outer periphery of the medium diameter portion 32b of the receptacle pull receiving portion 32. . Further, the cap 20 and the snapping member 8 are integrally formed, and the outer peripheral surface of the cap 20 and the outer circumferential surface of the tip of the clipping member 8 are substantially flush with each other. In addition, the handpiece section 24
When connected to the cable portion 29, the outer circumferential surfaces of the base 20 and the snapping member 8 and the outer circumferential surface of the receptacle pull receiving portion 32 are substantially flush with each other, so that the outer circumference of the connection portion can be covered with the cover 22.

Next, the handpiece section 24 and the cable section 2
9 will be explained. First, a disc packing 26 is inserted between the receptacle pull 30 and the plug 18,
The seven male pins 40 of the plug 18 are inserted into the holes 42a of the seven female pins 42 of the receptacle pull 30. Of course, at this time, the plugs 1 are inserted into the seven holes 58 of the disk packing 26.
This means that 7 male pins 40 of 8 are inserted. In this state, the disc packing 26 is attached to the receptacle 30.
Then, the cable section 29 is pushed into the handpiece section 24 until it comes into contact with the plug 18. Next, attach the base 2 to the male thread 27 of the medium diameter part 32b of the receptacle pull receiving part 32.
When the female screw 59 of the first fitting part 20a of the plug socket 20 is screwed in, the stepped part 55 at the tip of the third fitting part 20c of the cap 20 engages with the protruding part 51 of the plug receiving part 10. push the plug receiver 10 forward. If the cable part 29 is tightened against the hand piece part 24 until the disk packing 26 is crushed by a certain amount, the second fitting part 20b of the base 20 will be attached to the outer periphery of the small diameter part 32c of the receptacle pull receiving part 32. At the same time, the medium diameter fitting part 10a of the plug receiving part 10 is fitted to the inner circumference of the medium diameter part 32b of the receptacle pull receiving part 32, and the plug receiving part is fitted to the inner circumference of the small diameter part 32c of the receptacle pull receiving part 32. 10 small diameter fitting portion 10
b is fitted. When the disc packing 26 is crushed by a certain amount by the pushing, it comes into airtight contact with the end surfaces of the receptacle pull 30 and the plug 18, expands in the radial direction, and covers the inner peripheral surface of the second narrow diameter portion 45. Press it to make an airtight seal. Further, due to the expansion in the radial direction, the disk packing 26 is also brought into airtight contact with the male pin 40 of the plug receiving portion 10 inserted through the hole 58 thereof. Therefore, due to the close contact between the respective members, the motor arrangement space 36 is completely isolated from the inside of the cable portion 29, and airtightness is maintained.

Note that the housing 3 of the handpiece section 24
4 is provided with a suction passage 15 extending to the rear end side, and a connecting fitting 14 is provided on the rear end side of the suction passage 15. The suction passage 15 communicates with a suction passage 104 (see FIG. 5) provided in the cutting part 56, and is connected to a suction device (not shown) via a hose or the like connected to the connection fitting 14. ing.

Further, the connection portion 54 between the hand piece portion 24 and the cutting portion 56 of the electric surgical operating device 1 is as shown in FIG. A cutting part connection space 78 is provided in the connecting part 54 to which the rear end of the cutting part 56 is connected and accommodated. In addition, the cutting part connection space 78 is connected to the suction passage 1
5, so that the suction material sucked from the cutting part 56 can be conveyed to the suction passage 15.

[0025] Also, the motor arrangement space 3 of the connection part 54
A rotation transmission shaft 72 that is connected to the motor 52 and transmits the rotation of the motor 52 is inserted into the passage 79 that communicates with the motor 6 . Further, a cutting part connecting rotating shaft 82 is connected to the rotation transmitting shaft 72 by a pin 74 through a slot 81 to the cutting part 56 to transmit the rotation of the rotation transmitting shaft 72 to the cutting part 56. There is. Cutting part connection rotation shaft 82
is rotatably supported within the passage 79 by a bearing ring 76 fixed by a bearing fixing nut 34. Note that the bearing ring 76 is made of a fluororesin-based material with good sliding properties. In addition, the cutting part connection rotating shaft 82
A groove 77 is provided along the circumferential direction on the outer peripheral surface of. This groove 77 is provided with a Y-shaped seal ring 70 in order to ensure close contact between the cutting part connecting rotating shaft 82 and the bearing ring 76.
Two are placed. Thereby, it is possible to maintain sufficient airtightness between the cutter connection space 78 through which the sucked liquid and the like pass and the motor arrangement space 36. In particular, when sterilizing the handpiece section 24 in an autoclave,
The sealing ring 70 is essential since water vapor directly enters the cutter connection space 78. Note that the seal ring 70 is made of silicone rubber, neoprene rubber, fluororubber, or the like.

Further, the cutting part 56 connected to the cutting part connecting rotating shaft 82 of the cutting part connecting space 78 is as shown in FIG.

[0027] The cutting part 56 includes the outer tube 90 and the outer tube 90.
The inner tube 106 is rotatably inserted through a bearing ring 102. Bearing ring 102
is molded from a smooth fluorine-based resin. Furthermore, an engagement O-ring 100 made of fluororubber is provided between the inner tube 106 and the outer tube 90, and
A groove 96 is provided on the inner peripheral surface of the outer tube 90 facing the O-ring 100, and by applying a slight force to disengage the O-ring 100 and the groove 96, the inner tube can be separated from the outer tube. It is now possible to pull it out.

The outer tube 90 consists of a large diameter portion 90b that fits into the cutting portion connection space 78 and a small diameter portion 90a that is inserted into the living body. A pair of positioning pins 98 that are engaged with engagement grooves 83 (see FIG. 4) provided in the cutting portion connection space 78 are formed protruding from the large diameter portion 90b. The positioning pin 98 is engaged with the engagement groove 83 and positioned, so that the cutting part 56 is connected to the cutting part connecting rotation shaft 82.

Further, the inner tube 106 is formed in a hollow shape, and a cutting blade 92 is provided at the tip thereof. Also,
The rear end of the inner tube 106 protrudes from the outer tube 90 via the large diameter portion 90b of the outer tube 90. A large-diameter portion 106a is formed in this protruding portion, and the large-diameter portion 106a comes into contact with the large-diameter portion 90b of the outer tube 90 via the bearing ring 102.
06a is provided with a suction port 109 that communicates with the suction passage 104 inside the inner tube 106. In addition, the suction port 109
communicates with the suction passage 15 of the handpiece section 24 via the cutting section connection space 78 when the cutting section 56 and the cutting section connecting rotating shaft 82 are connected. Further, at the rear end of the large diameter portion 106a, a slot 81 of the cutting portion connecting rotation shaft 82 is provided.
A tongue 106b is formed that engages with the tongue 106b.

Also shown in FIG. 6 is a suction adjustment knob 50 attached to the handpiece section 24. This suction adjustment knob 50 has a suction hole 112, and by attaching it to the middle of the suction passage 15 provided in the handpiece section and rotating it, communication between the suction passage 15 and the suction hole 112 can be controlled. It has become. That is, the suction passage 15 can be closed or opened by rotating the suction adjustment knob 50. Further, the amount of suction can be continuously changed by the amount of rotation of the suction adjustment knob 50. Note that an O-ring 11 is provided on the outer periphery of the suction adjustment knob 50 to maintain sealing performance with the housing 34 of the handpiece section 24.
0 is set.

As explained above, the surgical operating device 1 of this embodiment has the lead wire 2 for energization in front of the motor arrangement space 36 in which the electric elements including the motor 52 are built in the handpiece section 24. is divided into two, and each of the divided lead wires 2 is electrically and mechanically connected by a receptacle pull 30 having a female pin 42 and a plug 18 having a male pin 40, and a sealing member is provided between the receptacle pull 30 and the plug 18. Since the disk packing 26 is provided, the inside of the motor placement space 36 and the inside of the cable portion 29 are completely isolated, and airtightness within the motor placement space 36 is reliably ensured. Therefore, even if autoclave sterilization is performed, water vapor etc.
The motor will not deteriorate due to water vapor etc.

Furthermore, since there is no need to perform other sterilization methods due to the risk of water vapor intruding into the motor arrangement space 36, reliable sterilization can be performed by autoclave sterilization. Further, even if the jacket tube 4 of the cable 28 is torn due to a user's mistake and water vapor or the like intrudes into the cable 28 from the torn part of the jacket tube 4, the seal structure using the disk packing 26 This prevents water vapor and the like from entering the motor placement space 36 and deteriorating the motor. Therefore, repair by replacing the cable 28 or the like is all that is required, and the repair cost can be reduced.

FIG. 7 shows a modification of the disk packing 26. This disk packing 120 has 7
It has a convex portion 122 around the opening of each through hole 124, and the other configuration is the same as that of the disc packing 26. According to this configuration, the handpiece section 24 and the cable section 29
When the cable part 29 is tightened to the hand piece part 24, the convex part 122 of the disc packing 120 comes into contact with the plug 18 and the receptacle pull 30 and is crushed, improving the airtightness of that part. It is something that makes you

Furthermore, as shown in FIG. 8, the disk packing 2
Instead of using O-rings 6, seven O-rings 22 made of silicone rubber or fluororubber as an airtight material may be interposed between the plug 18 and the receptacle 30. That is, it is sufficient to fit the seven O-rings 22 into the seven male pins of the plug 18 one by one. This facilitates assembly of the seal structure at the plug 18 and receptacle pull 30 portions.

It should be noted that the present invention is not limited to the above embodiments. For example, the material of the disk packing 26 may not be silicone rubber as long as it has a sealing effect. Further, the seal member inserted between the receptacle pull 30 and the plug 18 is the disc packing 26 or the O-ring 1.
The shape is not limited to 34, but any other shape may be used as long as it can be sealed at this portion. Further, the surgical device 1 is not driven by the motor 52, and may be, for example, an ultrasonic scalpel with a built-in ultrasonic transducer. Furthermore, in the surgical device 1, the cutting portion 56 may slide instead of rotating.

[0036]

[Effects of the Invention] As explained above, according to the present invention,
It is possible to prevent water, water vapor, etc. from entering into a region in which electric elements including electric elements that drive surgical treatment means are built-in. Therefore, even if autoclave sterilization is performed, for example, water vapor etc. will not enter the part containing the electrical elements, so the motor will not deteriorate due to water vapor etc., so the autoclave sterilization method can be carried out with confidence. Reliable sterilization is possible. Furthermore, even if the cable section is accidentally damaged and water vapor, etc. infiltrates into the cable section from the damaged part, the water vapor, etc. will not enter the part containing the electrical elements and cause the motor to deteriorate. Since there is no cable, all that is required is repair by replacing the cable part, etc., and the repair cost can be reduced.

[Brief explanation of drawings]

FIG. 1 is a surgical operating apparatus showing one embodiment of the present invention, and is a partially enlarged sectional view of section A in FIG. 2. FIG.

FIG. 2 is an overall configuration diagram of a surgical operating apparatus showing an embodiment of the present invention.

FIG. 3 is a schematic diagram showing a connection between a plug and a disc packing. .

FIG. 4 is a sectional view of a connecting portion between a cutting part and a hunt piece part.

FIG. 5 is a partial cross-sectional view of the cutting part.

FIG. 6 is a schematic diagram of a suction adjustment knob.

FIG. 7 is a schematic diagram showing a modification of the disc packing.

FIG. 8 is a schematic diagram showing how an O-ring is fitted into a plug.

[Explanation of symbols]

1...Surgical operation device 2...Lead wire 18...Plug 24...Handpiece part 26,120...Disc packing 29...Cable part 30...Receptor pull 40...Ospin 42...Female pin

Claims (1)

[Claims] Claim 1: The cable part includes a built-in energizing lead wire connected to a power supply part, and the hand piece part is connected to the cable part in an airtight manner to the outside. In the electrically operated surgical device in which an electrical element including an electrically powered element for driving a surgical treatment means is connected to the lead wire and is built in, a portion of the handpiece portion containing the electrical element including the electrically powered element is connected to the lead wire. At the front, the lead wire is divided into two parts, and each of the divided lead wires is electrically and mechanically connected by a receptacle pull part having a female pin and a plug part having a male pin, and the receptacle pull part and the plug part are connected to each other electrically and mechanically. An electrically powered surgical device, characterized in that a sealing member is provided in between.